Presently , the nucleation and growth mechanism of diamond has n ' t been known completely . thermodynamically , the nucleation and growth of diamond at low temperature and low pressure is still considered as a paralogism 目前金刚石的热力学成核及生长机理尚不完全清楚,金刚石在低温低压下的成核和生长,仍被认为是一种热力学的“悖论” 。